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VicVan
Samba Member
Joined: July 01, 2015
Posts: 1986
Location: Vancouver Island, BC
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 Posted: Tue Sep 24, 2024 6:06 pm Post subject: Re: Propex thermostat adjusting, moving the whole range downward |
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Any chance to make this work on a more recent version of the thermostat? Propex HS2211 from 2018, Canada. The temp range is just too warm.
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'90 Little Blue Truck, 2WD auto, FAS GenV 2.0 NA (AVH) |
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inorganic
Samba Member
Joined: September 26, 2016
Posts: 60
Location: Portland, OR
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| Posted: Thu Sep 03, 2020 12:07 pm Post subject: |
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Hi Jack - do you happen to have install photos of your HS2800? I am about to install mine under the rear bench, passenger side with the rear heater still installed. Its a tight fit and i looking for how others managed it.
cheers!
| jackbombay wrote: |
| I'll throw a high low thermometer in the van witht the proper running when I get home and let you know. |
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Vanlife Geek
Samba Member
Joined: September 19, 2014
Posts: 285
Location: CO
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| Posted: Tue Nov 26, 2019 5:31 pm Post subject: Re: Propex thermostat adjusting, moving the whole range downward |
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| skimhead wrote: |
| Why are images so fuzzy? |
Their Photobucket membership expired, I assume, so they blur the images. That's why it's always best to put your pictures directly on The Samba so they are there forever. Assuming The Samba is here forever and it darn well better be... I rely on it too much for it to ever go away!
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Vanlife Geek
Current:
1986 Syncro Westy
Previous:
1983 Westy
1981 Westy
1972 Bug (Last year you could buy a new one for under $2,000)
1965/66 Bug (2 bugs from a junk yard combined to make 1 functional bug)
1959 Bug (Pre Gas Gauge Era) |
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skimhead
Samba Member
Joined: September 14, 2005
Posts: 108
Location: Vancouver Canada
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| Posted: Tue Nov 26, 2019 4:13 pm Post subject: Re: Propex thermostat adjusting, moving the whole range downward |
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| Why are images so fuzzy? |
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jackbombay
Samba Member
Joined: October 19, 2007
Posts: 2725
Location: Portland Oregon
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| Posted: Fri Jan 16, 2015 9:52 pm Post subject: |
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| FNGRUVN wrote: |
| I think where you install the thermostat is important, as well. Too far away from the heater, and the heater will never shut off when it's really cold outside. Also, I'd keep the t-stat away from the windows and don't mount it to any body metal. |
YES!
The colder it is outside, the warmer the propex will keep the interior, if you have the thermostat mounted to the body metal.
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FNGRUVN
Samba Member
Joined: October 27, 2007
Posts: 2237
Location: Fort Collins, CO
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| Posted: Fri Jan 16, 2015 7:22 pm Post subject: |
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I think where you install the thermostat is important, as well. Too far away from the heater, and the heater will never shut off when it's really cold outside. Also, I'd keep the t-stat away from the windows and don't mount it to any body metal.
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kybishop
Samba Member
Joined: July 29, 2013
Posts: 58
Location: Where the wind is blowing, the mountains calling, and the adventure waiting
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| Posted: Fri Jan 16, 2015 6:14 pm Post subject: |
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Perfect! thanks again
Sounds like a very nice sweet-spot. Just warm enough to keep things from freezing at night, and still a lot of range to get you nice and toasty after an especially cold winter outing. |
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jackbombay
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Joined: October 19, 2007
Posts: 2725
Location: Portland Oregon
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kybishop
Samba Member
Joined: July 29, 2013
Posts: 58
Location: Where the wind is blowing, the mountains calling, and the adventure waiting
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| Posted: Fri Jan 16, 2015 2:01 pm Post subject: |
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Hey Jack,
Any updates on where the 15k resistor puts the low end of the thermostat?
Much thanks for your experiments! |
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jackbombay
Samba Member
Joined: October 19, 2007
Posts: 2725
Location: Portland Oregon
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| Posted: Thu May 23, 2013 10:34 am Post subject: |
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We've had a bit of a warm spring here o I haven't been able to test this out as much as I'd like, but we did get to 32* a couple days ago, and I had to turn the dial down to ~%30 of its max setting to get the heater to turn off, so the lowest setting is probably about 20*?. This is with 17,200k of resistance.
So, the 15k ohm resistor will probably be just about right all in all, yea, imagine that, the guys that designed it had the right idea right off the bat.
We're supposed to be down to 28* Saturday morning so I'll check where the 15k resistor puts the low end of the thermostat then.
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WLD*WSTY
Samba Member
Joined: November 04, 2009
Posts: 438
Location: Arizona
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| Posted: Mon Apr 29, 2013 8:56 pm Post subject: |
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| westyventures wrote: |
In the older Compact 1600 the post purge cycle is controlled by a 60 degree n/o thermostat in the heater, but of course under normal running that temperature would not be reached unless the heater was forced to run hot.
If that thermistor was changed for a 50 degree thermostat it may persuade it to come on more readily. |
Thanks Karl, that's good info, and I'll try it out. If I can't get that to work, I'll just use a time delay relay to energize the fan circuit when the thermostat shuts the furnace down.
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jackbombay
Samba Member
Joined: October 19, 2007
Posts: 2725
Location: Portland Oregon
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| Posted: Mon Apr 29, 2013 2:56 pm Post subject: |
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Update on the resistor, I ended up with a 17.2k resistor (15k + 2.2k in series) and I think it is just right, in the evening when it cools down and I'm wearing shorts and a t-shirt, right when I think "its a little cool in here" I can get the heater to turn on if I turn the thermostat to the max setting. This is of course an extreme example as if I were really somewhere cold I'd just have more clothes on. This assumes the lowest setting is around 35-40 degrees which I think it will be,and I'll be able to test that out when I get home in a week or so.
| westyventures wrote: |
| jackbombay wrote: |
| Witless Joe wrote: |
| jackbombay wrote: |
| the van |
Is this on the Sprinter, or did you get another Vanagon? |
El sprinter.
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I know that is no Vanagon, but inquiring/interested minds would like to see what you've done with the interior. My 'next' camper is going to be a custom Sprinter also.  |
I'll start a thread in the Off Topic forum in 5 days or so and post a link here, I will be on a river trip till the 4th  I'm just waiting for my wife and friends to get here and we'll be on the water tomorrow morning!
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Outback Kampers
Samba Member
Joined: December 29, 2004
Posts: 2345
Location: Oregon Outback
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| Posted: Mon Apr 29, 2013 9:36 am Post subject: |
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More from Propex UK:
In the older Compact 1600 the post purge cycle is controlled by a 60 degree n/o thermostat in the heater, but of course under normal running that temperature would not be reached unless the heater was forced to run hot.
If that thermistor was changed for a 50 degree thermostat it may persuade it to come on more readily.
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Karl Mullendore
1990 Syncro 16" sunroof Reimo highroof conversion
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Outback Kampers
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Joined: December 29, 2004
Posts: 2345
Location: Oregon Outback
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| Posted: Mon Apr 29, 2013 9:30 am Post subject: |
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| jackbombay wrote: |
| Witless Joe wrote: |
| jackbombay wrote: |
| the van |
Is this on the Sprinter, or did you get another Vanagon? |
El sprinter.
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I know that is no Vanagon, but inquiring/interested minds would like to see what you've done with the interior. My 'next' camper is going to be a custom Sprinter also.
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Karl Mullendore
1990 Syncro 16" sunroof Reimo highroof conversion
1990 Westy Multivan 112i automatic
1992 LT31 Karmann Distance Wide 'La Tortuga'
2014 Touareg X TDI |
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jackbombay
Samba Member
Joined: October 19, 2007
Posts: 2725
Location: Portland Oregon
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| Posted: Sun Apr 28, 2013 8:15 pm Post subject: |
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| Witless Joe wrote: |
| jackbombay wrote: |
| the van |
Is this on the Sprinter, or did you get another Vanagon? |
El sprinter.
Currently down south enjoying some warm weather, the Detroit coozie was given to me years ago and I always try to get pics with it in unique locations and I send the pics to the guy who gave it to me...
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Witless Joe
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Joined: May 06, 2005
Posts: 463
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| Posted: Sun Apr 28, 2013 10:27 am Post subject: |
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| jackbombay wrote: |
| the van |
Is this on the Sprinter, or did you get another Vanagon? |
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jackbombay
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Joined: October 19, 2007
Posts: 2725
Location: Portland Oregon
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Jon_slider
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Joined: April 11, 2007
Posts: 5091
Location: Santa Cruz, Crowdifornia
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| Posted: Sat Apr 27, 2013 9:52 am Post subject: |
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great job!
Im left wondering what the range of the thermostat is, once it is set.
iow, lets say it comes on at 50F, how high does it go before it shuts off.. 60F? That would be a 10 degree swing between off and on..
just curious how big the temperature swing is between thermostat on and off trigger points, for example, if set to shut off at 50, does it actually drop to 40, or less, before it comes on again?
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jackbombay
Samba Member
Joined: October 19, 2007
Posts: 2725
Location: Portland Oregon
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| Posted: Sat Apr 27, 2013 8:39 am Post subject: |
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| westyventures wrote: |
Great work, thanks for the detailed experiment - this should help out tremendously! Maybe we can get Propex to install a slightly higher resistor standard. Seems like a 45-75 range would be better suited to most folks. I've alerted them to this thread.  |
You're welcome
I installed a 17k resistor yesterday and I think its just about perfect for me. When the thermometer by my thermostat read 67* I had to have the thermostat knob about 1/8" of rotation (measured at the edge of the knob) from full blast to get the heater to come on. I don't have "lowest setting" info available yet, but once I get home in may we should should still have some nights in the 20's so I should have info on that soon.
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Outback Kampers
Samba Member
Joined: December 29, 2004
Posts: 2345
Location: Oregon Outback
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| Posted: Sat Apr 27, 2013 8:22 am Post subject: |
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| jackbombay wrote: |
Results from last night, the 22k ohm resistor lowered the whole temp range about 30*, with the thermostat maxed out, the heater clicked on when it got down to 50* F, normally at the max setting the heater should kick on at 80*.
So, for every 1k ohms of resistance added to 12k, the whole range will drop 3*, a 15k resistor should drop the range to 41*-71*.
I have done some reading around about resistors and you can get virtually any resistance you want by running them in series, so if you was a 15* temp drop you can run a 15k and a 2k ohm in series for a total of 17k ohms. |
Great work, thanks for the detailed experiment - this should help out tremendously! Maybe we can get Propex to install a slightly higher resistor standard. Seems like a 45-75 range would be better suited to most folks. I've alerted them to this thread.
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Karl Mullendore
1990 Syncro 16" sunroof Reimo highroof conversion
1990 Westy Multivan 112i automatic
1992 LT31 Karmann Distance Wide 'La Tortuga'
2014 Touareg X TDI |
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